Features: The solar system's violent past By Nola Taylor Redd Galaxy clusters: The universe's cosmic lenses By Liz Kruesi Fighting for visibility By Korey Haynes Observe winter planetary nebulae By Steve Coe The obsessive comet hunter By Richard Jakiel Confessions of a master sketcher By C. Renee James Rocketing off to (cyber)space By Tom Trusock We pur DayStar's Calcium Quark to the test By Tom Trusock